# -*- coding: utf-8 -*-
"""
Created on Mon Oct  7 18:45:20 2019

@author: XCL01
"""

import random
Activation = []
for i in range(65, 91):
    Activation.append(str(chr(i)))
for i in range(97, 123):
    Activation.append(str(chr(i)))
for i in range(10):
    Activation.append(str(i))
sample = len(input('sample: '))
def code():
    s = ''
    for i in range(sample):
        a = random.choice(Activation)
        s = s + a
        if len(s) == sample:
            s = s + '\n'
    return s
for i in range(200):
    print(code(),'\n')